Temperature-controlled regulating device.



TED" STAQE-f-TENTQFHCH yiiEiiEY EAEL BEIGHLEE, or Easr CLEVELAND, oiiio.

TEMPEEATURE-CONTROLLED REGLATING l DEVICE. j

Specification of Letters* Patent. Patented Apr. 29,-

Appiieauon fue@ rune i5, isos. seran No. 438,469.

Z all whom t muy concern:

Be i't known vthat I HENRY EARL BEIGH- i,nn, citizen of the United States, resident `of East Cleveland, county of Cuyahoga, and State of Ohio, haveniventcd a new and useful Improvement in Temperature-Controlled :Regulating Devices, of which the i'ollowiiigij,"v .lis a specification, the principle of the 1n'- vent-ioii being herein explained and the-best;

inodezin `which I have contemplated applyfrom lother inventions.`

This invention, pertaining as stated to temperature controlled regulating devices, relates more especially to apparatus of this ksort wherein the desired V regu ation is effected through the medium of an actuating i electric circuit.

The'control o'tthe'la-tter, then, is the objectr in- View, and it will be obviously iin- .tinaterial whether such. actuating .circuit be employed simply to give an alarm or to directly affect heating means, a damper, or

other mechanism.

Further ob]ejc`ts lofthe invention are to "much simplify apparatus of this sort, also to render theapparatus ei'ective loverwide n ranges of temperature, and at thcy same' time leave the apparatus sensitive to very small changes of teiiiperature y"atany portion ot' i such railige.v

To thef accomplishment of these and relateden'ds-said invention, then, consists of' ythe means hereinafter fully described and particularly pointed out in the claims.

AA'annexed drawing and the Yfollowing iption Set forth in detail certain mechanism, embodying the invention,` such Vdisclosed means constituting, however', but .one of various mechanical forms in which the principle of the invention may be used.

In'.- said aiinexeddrawing the figure is a. diagrammatic View of temperature controlled regulating apparatus involving my several imijirovenients.

Ithasalready been indicated that my in-` f vention chieiiyconcerns the arrangement ot the control circuit in apparatus of the class in hand, a relay being utilized in connection with such control circuit, by the operation of which the main, or actua-ting, circuit may be veither closed or opened as desired tovariously affect anydesired operating' mechay nism, be this a damper., an alarm, or in the case of an electric Jfurnace an electric switch .or any other mechanism. The control circuit is. characterized by the employment therein of a thermo-sensitive coil, such coil, as will now be explained, being'so connected, in a net work of conductors that the changes ot resistance vincident to tlie changes in temperature to which -it is exposed will serve to variously affect the relay aforesaid.v Referring, then, first of'all to the torni of apparatus illustrated ,in the figure, therelay will be seen to comprise an ordinaryelectromagnet A, one lega ot which include/sa single coil a2 wound in the ordinary t-ashin, the other a of' which includes Vtwo concentrically wound coils a3 c4 differentially connected so that as long as the same current flows throiighfsaidcoils Atherev will beno' .resulting ,'inagnetic fieldl induced a`ndno actuation of the armature a5 had'. Thedif- `ferential relay thus constituted by said'two diiiercutially connected coils of such electromagnct, together with the".theriiio-sensitive resistance A and another resistance. A2 are arranged (as will bc obvious from an iii-'- Spcction of the figure)r in the-'fondota llheatston'e bridge, wherein s idtwofdit'- ferentially ci'n'inected 'coils (zu at' constitute the arms adjacent toftlic the'riiiol-fs'ensitive" s ance. The 'coil of wound aboutA the herleg of thc electro-magnet isconnected lacross such bridge in the same 'tashioiias the galvanoincter is ordinarily included. In the same arm with the thermoiresistance Af there is furthermore included an adjustable resistance Af as shown; As a sourcef( :currcnt abattery B adapted to be connectediii the usual fashion to the respective 'coils and resistaiices that enter into the bridgeyis pro,.- vided or currentmay be taken from a light or Apower line B- asl hereinafter more particularly explained I f 1 The ymain or a-'uating circuit shown with't'h'reelcads il, o'. ind (as, and'tlie'finoi-e-V ment of the armaturen.5 is adapted lo coinplctethe circ-uit through'A the lead f, and

- ,either the lead a or (is depending' on Ithe -Varies in either direction, the resistance of Such coil will likewise vary and the balance of the bridge be immediately destroyed. Not only will there then be a current flowing through the bridge coil of the relay but the currents flowing through the coils of the differentially wound magnet leg will no longer be the same, and such coils will likewise be etfective. The 'coils on both legs will accordingly tend to actuate the armature of the relay. By reasontof these coils having obviously cumulative effect, an exceedingly small change in the resistance of the thermosensitive coil will suffice to cause the relayto attract the armature.

As illustrated in the figure, the. actuating circuitis shown with three leads as c al, 'whereby reversible operation of the motor or other device connected therewith may -be had. This, however, is immaterial, the arrangementof this part of the apparatus forming lno part of the present invention.

It. is contemplated that in numerous instances where apparatus of the type in hand may be employed, it will be more convenient to utilize current oli' a line than to employ a battery. In using a line, however, there is this difficulty to be apprehended, namely, that should the current through any failure of the dynamo or power station be interrupted, the regulating apparatus isinstantly incapacitated for use, by reason of which serious damage may result, depending upon the character of the regulation effected thereby. To guard against evils arising from this situation l have accordingly devised an automatic switch (sce figure), by means of which the current from the line B', as' on 110 volt service, will normally be used, but should this fail a* constant current battery B will be aut0mat-icallyput in circuit. This device comprises simply aswitch b adapted to close either the battery or line circuit, and simultaneously break the other. A. spring' b connected with such switch tends normally to close the battery circuit. A high resistance relay b2, however, in shunt with the line service is eli'ective to retain such switch open, as long as current is ilowing through said line. If, now, such cur- 4rent should accidentally, or otherwise, cease, 4the battery willbe instantly' thrown in circuit. Conversely7 upon resumption of the flow ot current in the line, the battery will be cut out 'withoutI any further attention, the operation throughout being entirely automatic.

Other modes of applying the principle of my invention may be employed instead of. the one explained,I change being made as regards the mechanism herein disclosed, pro-- `sided the means stated by any one of the following claims or the equivalent of such stated means be employed.

I therefore particularly point out and distinctly claim as my invention l. In apparatus of the character described, the combination with a main circuit and a 80 branched control circuit, of a diilerentially wound electro-magnet having its coils connected in the branches of said control circuit respectively, a thermo-sensitive coil connected in one ot said branches, a second electro-magnet4 connected across said branches, and an armature for said electromagnets so connected in the main circuit as to alternately make or break said circuit.

2. In apparatus et' the character described, 90 the combination with a main circuit and a branched control circuit, of a differentially Wound electro-magnet having its coils connected in the branches of said control circuit respectively, a thermo-sensitive coil and an adjustable resistance connected in one of said branche-s, a second'electro-magnet connectcd across said branches, and an arma- `ture tor said electro-magnets so connected in the main circuit` as to alternatively make or break said circuit.

3. In apparatus of the class described, the combination with a main circuit, of a control circuit comprising a thermo-sensitive resistance and three other resistances arranged to :torni a VVhe-atstone bridge, the two resistances adjacent to said thermo-sensitive resistance com rising the coils ot a diiierentially `vounL electro-magnet,` an electro-magnet connected acrosssaid bridge and cooperative with the first .electro-magnet, and an armature tor said electro-magnets so connected in the main circuit as to alternatively make or break said circuit.

,4. ln apparatus of the class described, the combination with a main circuit, of a control circuit comprising a thermo-sensitive resistance and three other resistances arranged to form a lVheatstone bridge, the two resistances adjacent to said thermo-sensit-ive resistance comprising the coils of a differentially wound electro-magnet, an adjustable resistance included in the same arm with said therindsensitive resistance, an electro-magneti connected across said bridge and coperative with said first electromag-` net, and an armature t'or said electro-magnets so connected in the main circuit as to alternatively make or break said circuit.

5. In apparatus of the class described, the 13u 1,059,971 f i a combination -With a main Circuit, of a control circuit comprising a thermQV-sensitive resistyence and three Vother i'esstginces arrangedy to form wWheaiqstone bridge, the two resistances adjacent to Vsaid thermo-sensitive resistance' comprising the coils of a difierentialiy w0und-e1ect1o-niagnet, 'an electromagnet-v connected aeross said'bridge and coperative 'with said rst eiectio-magnet,

1U :gn/armntuefoi? said -electromegnets so connected n. the main circuit as tQ alternatively make or break said circuit, and means l for holding said armature away from said electro-magnets Awhen an equilibrium exists in sadb'ridge; i

Signed by me this 9th day of June, 1908. i H. EARL BEIGHLEE. Attested by- E. R. RoDD,

JNO. F. OBERLIN. 

